1993 speedometer question
Working on a project truck truck set for 7 years in storage. Now, speedometer does not work properly. I have replaced the rear speed sending unit. Now it works periodically, then goes out again. I disconnect the battery. Turn the Ignition a cup of times to reset the computer. Speedometer will work again for thirty minutes and quit.
Any suggestions on what to look for next?
Any suggestions on what to look for next?

